U.S. Army soldiers are given three minutes to do as many push-ups as they can before sprinting to the pull-up bars during day one of the 14th Annual Warfighter Challenge on Fort Leonard Wood, Mo., Sept. 13, 2010. U.S. Army soldiers are given three minutes to do as many push-ups as they can before sprinting to the pull-up bars during day one of the 14th Annual Warfighter Challenge on Fort Leonard Wood, Mo., Sept. 13, 2010. SHARE: Download: Full Size (4.32 MB) Tags: photo essays Credit: VIRIN: 557021-X-LRM00-514.jpg Photo Gallery